56402189 has 2 divisors, whose sum is σ = 56402190. Its totient is φ = 56402188.

The previous prime is 56402179. The next prime is 56402201. The reversal of 56402189 is 98120465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50879689 + 5522500 = 7133^2 + 2350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56402189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56402119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28201094 + 28201095.

It is an arithmetic number, because the mean of its divisors is an integer number (28201095).

Almost surely, 2^56402189 is an apocalyptic number.

It is an amenable number.

56402189 is a deficient number, since it is larger than the sum of its proper divisors (1).

56402189 is an equidigital number, since it uses as much as digits as its factorization.

56402189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 56402189 is about 7510.1390799372. The cubic root of 56402189 is about 383.4999572206.

The spelling of 56402189 in words is "fifty-six million, four hundred two thousand, one hundred eighty-nine".